Faulty Signal

Faulty signal

Checking the wiring








- Ignition off
- Disconnect central electronic module (CEM) connector D.
Check the ground lead. Check for an open-circuit.
Take readings between:
- Central electronic module (CEM) terminal #D45 (45) and the fuel level sensor on the left-hand side.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Central Electronic Module (CEM)
- Signal specification Signal Description, Central Electronic Module (CEM)
- Central electronic module (CEM), replacing Replacing Central Electronic Module (CEM)
- Level sensor fuel tank, replacing Level Sensor, Fuel Tank, Right-Hand/Fuel Tank, Replacing
- Checking wiring and terminals Checking Wiring And Terminals





Was a fault detected?

Yes - Verification

No - Replacing the component

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Replacing the component
The central electronic module (CEM) has registered that the fuel level sensor on the left-hand side is faulty.
If the fault is intermittent, it has been registered previously but is no longer present. Intermittent faults can be caused by interference at start up of the central electronic module (CEM) or may be a different type of fault which occurs on different occasions. The fault is evaluated depending on how it occurs. Replace the fuel level sensor on the left-hand side if the fault recurs.
Replace the fuel level sensor on the left-hand side if there is a permanent fault.
Remedy as necessary.

Other information
- Level sensor fuel tank, replacing Level Sensor, Fuel Tank, Right-Hand/Fuel Tank, Replacing

Continue - Verification

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Verification





Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Check if the value at the fuel level gauge changes.

Is the value within its permitted range?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information





Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the wiring

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